Abstract

We present a full-wave analysis method on the transmission of a Gaussian light pulse through a spherical invisibility cloak with causal dispersions. The spatial energy distribution of the Gaussian light pulse is distorted after the transmission. A volcano-shaped spatial time-delay distribution of the transmitted light pulse is demonstrated as a concrete example in our physical model. Both the time-delay and the energy transport depend on the polarization of light waves. This study helps to provide a complete picture of energy propagation through an invisibility cloak.

Figures (4)

Propagation of a narrow-band Gaussian pulse through a frequency-dispersive spherical invisibility cloak with a target plane set up at z = 2.4μm. The pulse peak is at z = -120μm when t = 0. R2 = 2R1 = 1.8μm.

(a) Time delay distribution and (b) normalized accumulated energy distribution of the signal arriving at the target plane after passing through a dispersive spherical invisibility cloak. In (a), maximum delay is 35.1fs while the delay at the center is 27.9fs. In (b), the minimum is 0.7638 while it is 0.9075 at the center.